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Bayliss XL Automatic Roof Vent Opener

Bayliss XL Automatic Roof Vent Opener

Your Price: £24.95

Product Description

A very reliable Automatic Vent Opener to keep your greenhouse ventilated.

Suitable for aluminium or wooden greenhouses the openers are supplied complete with easy to follow instructions for a simple installation.

How the automatic vent opener works?

This Bayliss XL automatic vent opener is operated by a stainless steel cylinder containing wax which expands with heat. The heats pushes a piston causing the vent to open. As the temperature falls the wax contracts & a strong stainless steel spring closes the opener.

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